UI Copilot is an AI-powered design tool that offers immediate design feedback on any website. By using a screen capture tool, users can select any portion of a webpage to receive instant suggestions for improvement in areas such as layout, color schemes, and typography. The tool is designed to enhance the design skills of professionals and enthusiasts alike. It works seamlessly on public websites, localhost, and development servers, providing valuable design principles and insights as you browse. Currently free during its Beta period, UI Copilot is an essential tool for anyone looking to refine their design skills.